Albert thayer and martin joseph connelly



(No Model.

A. THAYER 8v M. J.O0NNELLY.

COMPRESSED AIR BRAKE.

No. 283,534.. Patented Aug. 21, 1883.

k w M WITNESSES: I IN YENTOR: 6M v 7 Mad H W m ATTORNEYS.

K PUERS. How-mum Wahinglnlil UNITED STATES PATENT OFFICE.

-- ALBERT HAYER Ann MARTIN JOSEPH oomnLLv, or noivnunv, MASS.

COMPRESSED-AIR BRAKE.

SPECIFICATION forming part of Letters Patent No. 283,534, dated August21, 1883.

Application filed July 7, 1888. (No modcll 7 To all whont it mayconcern:

Be it known that we, ALBERT Tnivine. and MARTIN J. CONNELLY, of Roxbury,Suil'olk county, Massachusetts, have invented a new and usefulImprovement in OompressedAir Brakes, of which the following is a full,clear, and exact description.

Our invention consists of atimeclosing device for the conductors valveor cook of the estinghouse compressed-air brake, so eontrivedthat whenthe said cook or valve has been opened to stop the train the said device will allow the cook or valve to remain open a sufficient length oftime to "stop the train, and. will then automatically close the cock toshut oil the air-pressure, and thereby I shortly enable the brakes .tobe released or let oil, so that the train will be ready to move on againwithout further attention to said valve or cook, and thus the trouble ofclosing the cock again before the train can proceed will be avoided,which must be done as now arranged if a cock is used; or, if asel fclosing valve is used, it has to be held open until the train steps,which is also avoided by our device, which consists, essentially, of aweighted lever applied to the cock to close it, with a retarderconsisting of a pneumatic piston and cylinder working either bycompression or vacuum, all as hereinafter described.

Reference is to be had to the accompanying drawingaforming .part of thisspecification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 represents a sectional elevation of our device in which therctarder worksby compression. Fig. 2 is a sectional elevation of thesame in which the retarder works by vacuum.

On the pressure-pipe of the lVest-ing'house automatic brake, at someconvenient place in each car, is placed sometimes avalve, sometimes acock, with a line running from it, which, being pulled, releases theair-pressure from the pipe and applies the brake to the whole train. Incase of a valve, it must be held open by the operator, or the brake willnot remain set. If it is a cook, the train will stop, but will be.delayed until the train-men close the cock, the engineer being unable torelease the brakes until the cock is closed. Delay resulting incollision is likely to occur when, in the night, the train-men areunable to find readily a cock that has been pulled by drunken orcareless passengers, as was the ease in the late Spuyten Duyvildisaster. We

therefore propose to employ a cock, (1, in the pressure-pipe I), withthe pull-cord 0 attached to a lover, (I, fitted to said cock for openingit to let the airflow out of the pressure-pipe, and to this lever weapply a weight, 6, for closing the cock, with a retarder consisting of acylinder, f, and a piston, g, either working by compression, as in Fig.1, or by a vacuum, as in Fig. 2, to resist the closing of the valve fora time, that will allow the train to stop before the cock is closed, butclosing the same soon after the train stops,so that not much time willbe lost before the train may go on again.

The piston is connected to the lever by its red h directly, and thecylinder is fitted on pivots i for a simple contrivanco; but in this"respect the arrangement maybe as preferred.

In Fig. l the piston has bucket or cup leather packing, which worksloosely upward to allow the piston to rise readily, but works tightlydownward and resists the fall of the weight by compression. until theair leaksthrough a small adjustable vcnt-hole in the piston, the size ofwhich governs the time it will take the weight to close the cook, thecylinder being open at the top and closed at the bottom. In Fig. 2 thepiston and packing are arranged the same as in Fig". 1; but the cylinderis open at the bottom and closed at the top, so that in this case it isthe vacuum that retards the weight.

\Ve do not abandon or dedicate to the public any patent-able featuresset forth herein and not hereinafter claimed, but reserve the right toclaim the same either in a reissue of any patent that maybe granted uponthis application or in other applications for Letters Patent that we maymake. 7

Having thus described our invention, we claim as new and desire tosecure by Letters Patent 7 The combination, with the conductors valve orcook in the pressure-pipe of the W'cstinghouse brake, of an automatictime-closing device, consisting of a weight and a pneumatic rctardor,substantially as described.

ALBERT THAYER. MARTIN JOSEPH CONNELLY.

\Vitnesses:

JACOB GOLDSMITH, lVIINNIE GOLDSMITH.

